Year: 2025
Type: preprint
Abstract: Low-power wide-area networks (LPWANs) demand high receiver sensitivity and efficient physical-layer signal processing. This paper introduces a unified framework for generalized block signal transmission in LPWANs, addressing the limitations of conventional symbol-by-symbol approaches. The framework comprises three key components: the signal block vector, the intra-block structure generator, and the signal basis matrix, and leverages quasi-orthogonal codewords formed through cyclically shifted spreading sequences. The resulting quasi-orthogonality enables reliable multi-user separation, particularly under asynchronous access. The framework establishes a conceptual foundation for block synchronization and provides a unified demodulation structure based on block correlation matching. It further supports flexible and systematic implementation, as demonstrated through applications to frequency-shift keying and chirp spread spectrum. This work advances scalable and efficient physical-layer design for next-generation LPWANs.
Source: arXiv (Cornell University)
Authors: Wen, Wenkun, Min, Tierui, Yuan, Long, Xia, Minghua
Topic: IoT Networks and Protocols
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4416774002
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